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Q. |
In a photocell light energy is converted into – |
A. | Potential energy |
B. | Chemical energy |
C. | Heat energy |
D. | Electrical energy |
Answer» D. Electrical energy | |
Explanation: Photocells are scientifically known as photo-resistors. A photo-resistor or light dependent resistor (LDR) is a resistor whose resistance decreases with increasing incident light intensity; in other words, it exhibits photoconductivity. A photo-resistor is made of a high resistance semiconductor. If light falling on the device is of high enough frequency, photons absorbed by the semiconductor give bound electrons enough energy to jump into the conduction band. |
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